Features: Experience double purpose versatility with the MAX4410 Headphone Amplifier Board, serving as both a headphone and pre amplifier for sound reproduction. Featuring low voltages 3.6 6V operate and super compact 50mm x 25mm dimensions, this miniature board delivers 80mW x 80mW output power while maintaining minimal distortion and power consumption. Designed for audiophiles and craft electronics enthusiasts seeking sound enhancement for portable devices or sound setups. enhances music playback studios, upgrade portable , or optimize headphone performances during travel with this space efficient amplifier solution. Built with strong plastic housing, the MAX4410 amplifier board ensures stable performances for long term integration into compact sound systems or headphone driven applications. Specifications: Working voltages: 3v-12v Board size: 50mmx25mm output power: 80mwx80mw Package Includes: MAX4410 headphones note: Due to the problemsof lighting effects and shootingangles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment